Which of the following are functions of the Network Layer?Group of answer choicesLogical addressingPhysical addressingPath determinationError checking

1. Break Down the Problem

To identify which of the given options are functions of the Network Layer, we need to analyze each function and determine its relevance to the Network Layer in the OSI (Open Systems Interconnection) model.

2. Relevant Concepts

The Network Layer is primarily responsible for the following functions:

• Logical addressing: Assigning unique logical addresses to devices to identify them on the network (e.g., IP addresses).
• Path determination: Deciding the best path for data to travel from source to destination through the network.
• Error handling: The Network Layer does manage some aspects of error handling, but it generally relies on the Transport Layer for end-to-end error checking.

3. Analysis and Detail

• Logical addressing: This is a key role of the Network Layer. It enables devices to communicate across different networks by using IP addresses.
• Physical addressing: This is not a function of the Network Layer but rather of the Data Link Layer, which deals with MAC (Media Access Control) addresses.
• Path determination: This is a critical function, as the Network Layer determines how packets should be routed to reach their destination.
• Error checking: Although some error detection methods may be implemented at the Network Layer, robust error detection and recovery are handled at the Transport Layer.

4. Verify and Summarize

After reviewing each option:

• Logical addressing: Yes, it is a function of the Network Layer.
• Physical addressing: No, it is not a function of the Network Layer.
• Path determination: Yes, it is a function of the Network Layer.
• Error checking: While the Network Layer may have some error management capabilities, it is not primarily responsible for robust error checking.

Final Answer

The functions of the Network Layer include:

1. Logical addressing
2. Path determination

Thus, the correct options are Logical addressing and Path determination.